16-2 中波ラジオ用可変形高指向性受信アンテナ
A variable Narrow directional receiving antenna for a MF Radio service

Tsuyoshi Sasaki, Takao Yamamoto
1996 Proceedings of The ITE Annual Convention  
doi:10.11485/tvac.32.0_214 fatcat:aem3jehjirhqplipn3ldwzfbby